| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417545000 | Valved piston | 39 |
| 20080219869 | COAXIAL PUMPING APPARATUS WITH INTERNAL POWER FLUID COLUMN - A pump having an increased energy efficiency is provided. The pump has an internal power fluid column and a transfer piston which is reciprocatingly mounted about the power fluid column. The transfer piston defines a product fluid chamber, located above the transfer piston valve, and a transfer chamber, located below the transfer piston valve. The power fluid column has at least one passageway, which allows the fluid inside the power fluid column to be in communication with a power fluid chamber. The power fluid chamber, the transfer chamber, and the product chamber are situated coaxially about the power fluid column. | 09-11-2008 |
| 20080226479 | Piston Pump With Improved Piston - The invention relates to a piston pump for conveying a fluid, in particular in a vehicle brake system. The piston pump has a cylinder and a piston movably disposed in the cylinder. A restoring element preloads the piston, and a drive unit for actuates the piston in the cylinder to pump the fluid into a pressure chamber formed in the cylinder. The piston is embodied by a first piston par and a second piston part. The first piston part is a cylindrical body, which can be moved by the drive unit. The second piston part form the piston base, in which four radial inlet openings and one axial connection opening for communication with the pressure chamber are disposed. A flange for the disposition of a seal is disposed on the outer circumference of the piston base element. The openings are simple to make in the face ends and circumferential regions of the second piston part. | 09-18-2008 |
| 20090060766 | ADJUSTABLE LENGTH BICYCLE MOUNTABLE HAND PUMP - An adjustable length bicycle mountable hand pump. The pump includes a barrel having an internal cylinder within which a piston is reciprocatingly moveable. A piston rod connects to a piston at a proximal end and to a handle at a distal end. The handle is selectively, longitudinally, adjustably lockable relative to the barrel. The end of the handle is contoured to mate with a bicycle frame member. A head having a contoured portion mates with an opposing spaced bicycle frame member. | 03-05-2009 |
| 20090175747 | Manual evacuation system - A gastight interface for an evacuation device comprises a flexible suction cup adapted to form a gastight seal with a surface surrounding a valve disposed on a container and extending from an evacuation end of an evacuation chamber. The flexible suction cup has an aperture disposed therethrough for fluid communication with the evacuation chamber. A plurality of support members extends from the evacuation end of the evacuation chamber to restrict movement of the flexible suction cup between the surface and the evacuation end of the evacuation chamber to allow fluid communication between an interior of the container and the evacuation chamber through the valve when the valve is in an open position while the piston is being reciprocated between the closed end and the evacuation end. Each support member has a distal surface disposed outside of an outer perimeter of the flexible suction cup. | 07-09-2009 |
| 20090185923 | FUEL SUPPLY PUMP - The invention provides fuel supply pump that can improve the durability of a fuel inlet valve and stably pressure-feed high pressure fuel of a large flow rate. In the fuel inlet valve according to the invention, a valve piston includes, in its outer surface in the vicinity of an end portion on an opposite side of a collar portion, a groove portion to which a fastener for fixing the valve piston and a spring seat locks. The spring seat includes an open portion into which the valve piston is inserted and includes, along an edge of the open portion, a step portion to which the fastener locks. The valve piston is inserted into the open portion of the spring seat, and the fastener is thereafter caused to lock to the groove portion of the valve piston. The spring seat is energized by a spring to cause the fastener to lock to the step portion, whereby the spring seat is fixed to the valve piston. A clearance is disposed between the fastener and at least one of an edge portion of the groove portion on an energizing direction side and an edge portion of the step portion on the opposite side of the energizing direction. | 07-23-2009 |
| 20090311117 | PUMP DEVICE, FOR INSTANCE FOR FRONT AND REAR WHEEL DRIVEN MOTORCYCLE - A pump arrangement is arranged to be driven by a rotating shaft and comprises a piston arrangement that generates a flow pulse. The piston arrangement has pistons that move axially forward and backward. An actuating device is connected to the rotating shaft and drives the piston arrangement. The actuating device has a cross section of constant width with at least three corners. During rotation caused by the rotating shaft, the actuating device is arranged to interact with carrier devices that are associated with the pistons. | 12-17-2009 |
| 20100111735 | Foam Pump - A foam pump, comprising a pump body ( | 05-06-2010 |
| 20100119394 | CYLINDER PISTON ARRANGEMENT FOR A FLUID PUMP OR A FLUID MOTOR - The invention relates to a cylinder piston arrangement for an especially volumetric fluid pump or a fluid motor, preferably comprising at least one axial expansion tubular membrane piston defining at least one inner pulsating working chamber. A particular field of application for such pumps or motors is the operation thereof with fluids loaded with extraneous materials, especially abrasive granulated materials. Especially high-speed machines with high working pressures of between a few hundred to a thousand bar are required, the energetic and also volumetric degree of efficiency thus becoming highly important factors. The aim of the invention is therefore to create pumps or fluid motors which are characterised by high degrees of efficiency and long service lives. To this end, at least one clearance driving body (TK | 05-13-2010 |
| 20100183463 | PISTON FOR A REFRIGERATION COMPRESSOR - A piston of the type comprising a tubular skirt portion which is closed, next to an end edge, by a head portion, the skirt portion being defined by a respective tube extension and presenting an end edge region configured to affix a head portion formed in a separate piece and having a peripheral contour internal to an axial projection of the outer contour of the skirt portion. | 07-22-2010 |
| 20100183464 | WATER PUMP - A water pump for delivering water from a well to the surface has a housing with a reciprocable plunger disposed therein. The housing is preferably comprised of PVC and tubulars which are connected to make up the plunger assembly are likewise PVC. A proximity bushing is disposed in the housing and the plunger assembly reciprocates in the housing through the proximity bushing. Reciprocation of the plunger assembly draws water into the housing and forces water from the housing into the plunger assembly to the surface. | 07-22-2010 |
| 20100209275 | HYDRAULIC CYLINDER HAVING PISTON-MOUNTED BYPASS VALVE - A hydraulic cylinder is disclosed. The hydraulic cylinder may have a tube, and a piston disposed within the tube and having a bore passing through the piston. The hydraulic cylinder may also have a valve element disposed within the bore and having a length shorter than a length of the bore. The valve element may be mechanically movable to allow fluid flow through the bore, and hydraulically movable to inhibit fluid flow through the bore. | 08-19-2010 |
| 20100290939 | REFRIGERANT COMPRESSOR - Refrigerant compressor for a hermetically encapsulated small refrigerator, which has a piston ( | 11-18-2010 |
| 20130156622 | PNEUMATIC TOOL HAVING CLOCKWISE AND COUNTERCLOCKWISE ROTATION FUNCTION - A pneumatic tool includes a housing, an air cylinder disposed in the housing, a valve unit, and a controlling unit. The air cylinder has an outer surface formed with a valve seat. A rotary valve of the valve unit is rotatable to allow compressed air to flow into the air cylinder through a selected one of first and second passages to thereby produce clockwise or counterclockwise rotation of the tool. The controlling unit includes a movable pin operable to move in the housing to drive rotation of the rotary valve. Preferably, the valve unit is disposed on the housing in a manner that the space occupied thereby in the housing is reduced. | 06-20-2013 |
| 20130302195 | LOW RESIDUAL INVERTED PUMPS, DISPENSERS AND REFILL UNITS - A foam pump including a housing and a piston that reciprocates within the housing is disclosed herein. The piston has a hollow portion and an orifice through the wall of the piston. A first seal located proximate the upper end of the piston provides a seal between the piston and the housing. A liquid inlet is located in the side wall of the housing at a point lower than the top of the piston. A one-way liquid inlet valve is located proximate the liquid inlet and a one-way liquid outlet valve is located prior to the liquid outlet. A charge chamber is defined at least in part by the liquid inlet valve, the liquid outlet valve, a wall of the piston and a wall of the housing. | 11-14-2013 |
| 20140099224 | VARIABLE VOLUME BORE PISTON PUMP - A piston pump which permits advantageous operation over both short stroke piston movement and long stroke piston movement. | 04-10-2014 |
| 20150337823 | Lubricant-Free Compressor Having a Graphite Piston in a Glass Cylinder - A substantially lubricant-free compressor comprising a glass cylinder having a hollow interior, a graphite piston within the glass cylinder, a connecting rod operably attached to the graphite piston, a cylinder head sealing one end of the glass cylinder, an exhaust valve in operable connection with the hollow interior of the glass cylinder, and an inlet valve in operable connection with the hollow interior of the glass cylinder. The compressor may be driven by any suitable means including without limitation a brushless DC motor or a smart material actuator. | 11-26-2015 |
| 20150377227 | IMPROVEMENT IN A PISTON FOR A REFRIGERATION COMPRESSOR - The piston (P) comprises a tubular skirt ( | 12-31-2015 |
| 20150377228 | LINEAR COMPRESSOR, SHELL FOR LINEAR COMPRESSOR, AND METHOD FOR MANUFACTURING SHELL OF LINEAR COMPRESSOR - A linear compressor, a shell for a linear compressor, and a method for manufacturing a shell of a linear compressor are provided. The shell may have at least one portion having a multilayer plate, in which at least two plates may be stacked in a direction substantially perpendicular to an axis of a piston so as to accommodate a cylinder, the piston, which may be reciprocated within the cylinder, and a motor assembly directly connected to the piston to provide a drive force to the piston. At least one resonator may be disposed in or at at least a portion of an inner surface of the shell. | 12-31-2015 |
| 20160097387 | SUPPORT STRUCTURE FOR LINEAR-COMPRESSOR MOVING COMPONENT, LINEAR COMPRESSOR, AND CRYOGENIC REFRIGERATOR - A linear-compressor moving component support structure includes: a plurality of leaf spring parts each elastically supporting the moving component in the compressor container such as to allow its axially reciprocating movement; a plurality of first auxiliary spring parts, each of which has first axial rigidity and is located adjacent to one of opposite sides of a corresponding leaf spring part; and a plurality of second auxiliary spring parts, each of which has second axial rigidity and is located adjacent to the other of the opposite sides of a corresponding leaf spring part. The second axial rigidity is different from the first axial rigidity such as to correct deviation, arising due to pressure differences between the high- and low-pressure chambers exerted on the moving component, of actual range of axial movement of the moving component from a predetermined range of axial movement of the moving component. | 04-07-2016 |
| 417546000 | Piston contains inlet and outlet valves | 4 |
| 20090028733 | Compressor Valve Plate Assembly with Integrated Gasket - A valve plate assembly is provided including a plastic plate having a plurality of apertures therethrough, including at least one suction passage and at least one exhaust passage. A suction reed valve is disposed over the suction passage and an exhaust reed valve is disposed over the exhaust passage. A cylinder gasket is molded to a first side of the plastic plate and is adapted to seal around a cylinder of a cylinder housing. The cylinder gasket is recessed in a groove in the plastic plate. An end cap gasket is molded to a second side of the plastic plate and is adapted to seal against an end cap of a compressor. The end cap gasket is recessed in a groove in a second side of the plastic plate. The reed valves contact the plastic plate and are, therefore, quieter than a reed valve that is operated against a metal plate. The integration of the gasket into the recessed grooves of the plastic valve plate eliminates potential leak paths that exist with current designs. The use of a plastic valve plate also greatly reduces the weight and cost of the valve plate assembly. The valve plate assembly also provides an assembly which can be shipped to a customer in one piece for easier handling and installation. | 01-29-2009 |
| 20100098567 | PISTON PUMP - The present invention relates to a piston pump. A piston with at least one transverse bore and a longitudinal blind bore, has a plate element with an opening, arranged on the piston at an opening of the longitudinal blind bore. The invention includes an inlet valve, an outlet valve, and a pressure chamber arranged between the inlet valve and the outlet valve. The inlet valve has a pretensioning element, a closing element, and a sealing seat, which sealing seat is built on the plate element. | 04-22-2010 |
| 20100278670 | AIR PUMP WITH A ONE-PIECE CYLINDER - An air pump has a one-piece cylinder and a piston assembly. The one-piece cylinder has a body, a cap, a pedal and a base formed together by injection molding and welding process. The piston assembly is mounted in the one-piece cylinder and has a rod, a handle and a piston. The one-piece cylinder is structurally firm and provides excellent hermetic characteristics. | 11-04-2010 |
| 20150110657 | Adjusting Device for an Adjusting Piston of a Variable Clearance Space of a Reciprocating Compressor - In order to enable a continuous adjustment of the variable clearance space ( | 04-23-2015 |
| 417549000 | Having separate means biasing valve closed | 3 |
| 20080310979 | Piston Pump With Improved Efficiency - The present invention relates to a piston pump for delivering hydraulic fluid, including a reciprocating piston for building up pressure in a pressure chamber; a sealing element is situated on the piston; during a compression phase, this sealing element produces a seal between the pressure chamber and a low-pressure region of the piston pump and during an intake phase, it opens a connection between the pressure chamber and the low-pressure region in order to draw hydraulic fluid into the pressure chamber. | 12-18-2008 |
| 20100202908 | SUPPLY DEVICE - A supply device for the supply of pressure fluid into at least one vehicle brake or into a pressure fluid accumulator, wherein a piston is movably arranged in an accommodating member, a carrier bears a non-return valve arranged coaxially to the piston for the purpose of ventilating a working chamber into which the piston plunges, and wherein a resetting spring is arranged between the carrier and the piston. A multi-piece cage facilitating inserting the resetting spring into the cage parts, the cage parts comprise fastening means that lock the cage due to relative displacement of the cage parts, and the resetting spring is caged and simultaneously elastically preloaded under the relative displacement of the cage parts. | 08-12-2010 |
| 20100284841 | PISTON PUMP FOR DELIVERING A FLUID, AND ASSOCIATED BRAKE SYSTEM - The invention relates to a piston pump having a piston assembly including at least one cross bore and a longitudinal bore corresponding to the at least one transverse bore, a cylinder, into which the piston assembly is guided in a longitudinally movable manner, and an inlet valve with a cage element, in which an inlet valve spring and an inlet valve sealing element are disposed, and a corresponding inlet valve seat, which is disposed on the piston assembly. Fluid can be guided through the longitudinal bore into a compression chamber via the inlet valve. A return spring is disposed in the compression chamber for the piston assembly. The invention further relates to an associated braking system. The cage element has a resilient high-pressure sealing element that is configured to receive radially acting power components, and to effect a seal against a cylinder wall via a radial sealing surface, and in order to effect an axial seal against the piston assembly via an axial sealing surface. | 11-11-2010 |
| 417550000 | Flexible | 1 |
| 20100260635 | DISCHARGE VALVE FOR LINEAR COMPRESSOR - A discharge valve is adapted to a linear compressor which is elastically supported in an axial direction by a discharge valve spring and which opens/closes a compression space defined between a cylinder and a piston, the discharge valve comprising: a body made from a metal material; and a coating layer made from a plastic material to wrap the body. The linear compressor provided with such a discharge valve is ensured with a satisfactory level of strength with less use of materials. | 10-14-2010 |
| 417552000 | Reciprocating | 12 |
| 20090068042 | CYCLONIC, DEBRIS REMOVING VALVE AND METHOD - There is provided, in one embodiment, a ball valve for regulating the flow of petroleum fluids therethrough. The ball valve is capable of transitioning between an open and a closed position. The ball valve includes in one embodiment a hydraulic piston, containment union, ported stem, containment cage and drag plunger, and is adapted to regulate the flow of fluid northward through the valve. A ball and seat should be positioned above these components, so that the hydraulic piston may extend therethrough. More specifically, during a pump downstroke, fluid enters the drag plunger, moves northward through the containment cage and into the interior of the ported stem, exits the interior of the ported stem and enters a plurality of angled veins, which impart cyclonic motion on fluid passing northward therethrough, assisting in the removal of debris. Also during the downstroke, a pedestal portion of the hydraulic unseats the ball from the seat. During the upstroke, the piston withdraws, permitting the ball to come to rest on the seat, closing the valve. | 03-12-2009 |
| 20090196779 | BYPASS VALVE AND DOWNHOLE PUMP - A pump comprising a body assembly and a plunger assembly slidably received in the body assembly. The body assembly comprises a standing valve, a discharge valve, and a pump barrel cooperating to define a pump chamber. The standing valve opens to permit fluid to flow into the pump chamber from outside the tubing responsive to a negative pressure gradient across the standing valve. The discharge valve opens to permit fluid to flow out of the pump chamber and into the tubing responsive to a positive pressure gradient across the discharge valve. | 08-06-2009 |
| 20100040497 | POPPET VALVE ASSEMBLY - A novel valve assembly is provided. In one embodiment, the valve assembly includes a seat plate having a plurality of fluid conduits. The valve assembly may also include a plurality of poppet assemblies. In some embodiments, a poppet assembly of such a plurality includes at least one fluid port and a housing configured to be coupled to the seat plate to facilitate flow of a fluid through a respective fluid conduit via the at least one fluid port of the respective poppet assembly. Other devices, systems, and methods related to poppet assemblies are also disclosed. | 02-18-2010 |
| 20100166587 | GRAVITY-ASSISTED FLUID PUMP - A gravity-assisted fluid pump includes a fluid reservoir, a piston, a valve element, a piston operator, and a valve operator. The piston is movably disposed within the fluid reservoir and is movable between an uppermost position and a lowermost position. The valve element is movable between a closed position and an open position. The piston operator moves the piston between the uppermost position and the lowermost position. The valve operator selectively moves the valve element between the closed position and an open position. | 07-01-2010 |
| 20130195703 | POPPET VALVE ASSEMBLY - A novel valve assembly is provided. In one embodiment, the valve assembly includes a seat plate having a plurality of fluid conduits. The valve assembly may also include a plurality of poppet assemblies. In some embodiments, a poppet assembly of such a plurality includes at least one fluid port and a housing configured to be coupled to the seat plate to facilitate flow of a fluid through a respective fluid conduit via the at least one fluid port of the respective poppet assembly. Other devices, systems, and methods related to poppet assemblies are also disclosed. | 08-01-2013 |
| 417553000 | Annular | 1 |
| 20090155109 | AIR EXTRACTOR PUMP FOR WATERBEDS - The invention relates to an air extractor pump for waterbeds comprising a piston ( | 06-18-2009 |
| 417554000 | Ball type | 6 |
| 20080247893 | High Compression Downhole Pump - A downhole pump has a barrel and a plunger. The barrel has a first one-way valve and the plunger has a second one-way valve. The plunger is of the box end type. The pump prevents or minimizes gas lock by achieving high compression in the compression chamber between the two valves. The second valve is located close to the bottom end of the plunger. In the second valve, the valve seat is in contact with the seat plug, which seat plug has a seal. Alternatively, the valve seat is incorporated into the seat plug, which seat plug also has a seal. The plunger lacks reliefs at the bottom end and thereby achieves tight tolerances with the barrel, further contributing to high compression. | 10-09-2008 |
| 20090028734 | PUMP ASSEMBLY WITH PRESSABLE HEAD - A pump assembly with a pressable head comprises a push tube, an inner tube, a stop valve, and an outer tube; a top of the push tube passing through the outer tube; the push tube being communicated to the inner tube; a bottom of the inner tube being formed with an annular plug; the plug of the inner tube having a plurality of via holes with inclined inner walls; a top of the inner tube having a stop valve; the stop valve being a flat structure; a periphery of the stop valve being formed with an elastic structure; by the elastic deformation of the periphery of the stop valve, the stop valve will tightly adhere to an inner wall of the outer tube; an interior of the outer tube having a stepped structure with a larger size at an upper side and a smaller size at a lower side. | 01-29-2009 |
| 20100215530 | PISTON PUMP FOR A VEHICLE BRAKE SYSTEM, HAVING A PISTON ROD - The invention relates to a piston pump for a vehicle braking system, having a housing section and a piston that is displacably guided into the housing section. A receiving cap is provided for receiving an inlet valve. A sealing element is connected to the receiving cap for sealing the piston and a piston rod that is joined to the sealing element. The piston rod has a first and a second piston rod element. In the first piston rod element, a fluid inlet for introducing the fluid into the inside of the piston is provided. The second piston rod element partially covers the fluid inlet in the axial direction of the piston. | 08-26-2010 |
| 20110158836 | LIQUID PAINT PUMPING APPARATUS - The invention relates to a liquid paint pumping apparatus comprising a piston reciprocable in a cylinder to pump liquid paint during a substantially horizontal pumping stroke of the piston and to charge the cylinder with paint during a reverse stroke of the piston. The apparatus further comprises a check valve disposed within the piston, the check valve comprising: a ball member, a seat, a spring urging the ball member into engagement with the seat, and a plastics cage guiding movement of the ball towards and away from the seat. The seat receives the ball member so as to form a seal to prevent flow of liquid paint between the ball and the seat during the pumping stroke of the piston, and the ball member moves away from the seat during the reverse stroke of the piston. | 06-30-2011 |
| 20110182758 | Mechanism to Raise the Efficiency of a Reciprocating Refrigeration Compressor - An improvement to raise the efficiency of a reciprocating refrigeration compressor, the improvement comprising a channel in the piston that transfers pressure from the clearance volume of the cylinder to the low pressure side of the piston when an opening of the channel aligns with a groove or a duct in the cylinder wall. Alternately, the channel comprises a ball extending from and held to the clearance volume opening of the channel by a spring. When the spring is compressed, the ball is moved from the opening, and pressure in the clearance volume is transferred to the low pressure side of the piston. | 07-28-2011 |
| 20120141310 | SAND PLUNGER FOR DOWNHOLE PUMP - A downhole pump has a barrel and plunger. The barrel has a first one-way valve and the plunger has a second done-way valve. The plunger reciprocates with respect to the barrel. The plunger has a first end which has a tapered leading edge. Ports are adjacent to the leading edge. The ports communicate with a passage in the plunger. A sucker rod string coupling is located at the plunger first end. The sucker rod string coupling is coupled to walls located between the ports. The end of the sucker rod string coupling that is coupled to the plunger is tapered so that fluid can flow out of the ports. The sucker rod string coupling and the plunger first end form an integral member that couples to the remainder of the plunger. | 06-07-2012 |
